The author concluded that these (unverifiable) data indicated that the male performance advantage could be sufficiently mitigated by hormone treatment to ensure fairness when competing with female athletes in running.
Logically, this claim cannot possibly be correct!
Changing a hormone level does nothing to diminish the vast biological differences between male and female athletes. Sex differences in body size, shape, proportion and composition persist, irrespective of hormonal status.
Males have a tremendous advantage over females in regards to such immutable characteristics as skeletal frame, heart size, lung volume, and muscle mass.
Adding together a multitude sex-based differences in both form and function results in sport performance dominance by male competitors.
All you have to do is look at world records in athletics or weightlifting or swimming. Female performances never come close to the male records!
Even if the one study on the eight runners could be believed, it says nothing about sports requiring other biomotor abilities, such as muscular strength and power required in Olympic weightlifting, for example.
The following concession was made at the end of the report on the eight runners:
"It should be noted that this conclusion only applies to distance running and the author makes no claims as to the equality of performances, pre and post gender transition, in any other sport."
NEVERTHELESS, the IOC went ahead and changed their regulations as if completely oblivious to the inevitable harm it would do to the female athlete class! Like falling dominoes, many global sports federations took the cue to adopt the same policy.
And now, in 2021, we have witnessed the alarming trend in male born athletes, like New Zealand's Laurel Hubbard, self-identifying into women's sports and taking podiums, titles and opportunities away from female competitors.